E.i. Dupont De Nemours and Company

Other

Richard Hall Young

Reiyao H Zhu

E Peter Lancaster

Reginald Thomas Kruszewski

Natalia V Levit

Susan L Lovasic

Edward T McLaughlin

The present invention relates to a flame resistant thermal liner comprising a nonwoven sheet comprising nanofibers of a synthetic polymer having an limiting oxygen index of at least 21, a mean flow pore of 10 micrometers or less, a thickness air permeability of 25 to 6000 cubic feet per min&#x2212;micrometers (12 to 2880 cubic meters per square meter per min&#x2212;micrometers), and an average thickness T; and a thermally stable flame resistant fabric attached to an outer surface of the nonwoven sheet, the fabric having an average thickness T; a surface of the thermally stable fabric being in contact with a surface of the nonwoven sheet; wherein Tand Tare selected such that the ratio of Tto Tis less than 0.75. The invention also relates to a flame resistant composite fabric comprising the flame resistant thermal liner and a garment comprising this flame resistant composite fabric.

Flame resistant thermal liner, composite fabric, and garment

The present invention concerns a thermal liner sub-assembly comprising crimped, heat resistant fibers held in a state of compression by a binder adhered to at least one thermally stable flame resistant stabilizing fabric wherein, when the thermal liner is exposed to heat or flame, the liner increases its thickness by at least one hundred percent and the shrinkage of the liner is no more than ten percent. The invention also relates to use of such liners in protective fabrics, garments, and articles.

Thermal liner subassembly, fabric and method of use

This invention concerns a flame-resistant garment having an outer shell fabric comprising 50 to 95 parts by weight of a polypyridobisimidazole fiber having an inherent viscosity of greater than 20 dl/g and 5 to 50 parts by weight of polybenzimidazole fiber.

Garments comprising high strength extreme thermal performance outer shell fabric of polybenzimidazole and polypyridobisimidazole fibers

The invention concerns a fabric useful in apparel and garments comprising an intimate blend of staple fibers, the blend of fibers comprising 55 to 95 parts by weight of a polypyridobisimidazole fiber having an inherent viscosity of greater than 20 dl/g and a tensile modulus of greater than 120 GPa (820 gpd); and 5 to 45 parts by weight of a flexible fiber having a tensile modulus of less than 10 GPa (70 gpd).

PIPD comfort fabrics and articled made therefrom

The invention concerns a flame-resistant garment having an outer shell fabric comprising 5 to 40 parts by weight of a polybenzobisoxazole fiber and 60 to 95 parts by weight of a polypridobisimidazole fiber having an inherent viscosity of greater than 20 dl/g.

Thermal performance garments comprising an ultraviolet light tolerant outer shell fabric of polypyridobisimidazole and polybenzobisoxazole fibers

The invention concerns a flame-resistant garment having an outer shell fabric comprising 50 to 95 parts by weight of a polybenzobisoxazole fiber and 5 to 50 parts by weight of a polypridobisimidazole fiber having an inherent viscosity of greater than 20 dl/g.

Thermal performance garments comprising a bleach tolerant outer shell fabric of polypyridobisimidazole and polybenzobisoxazole fibers

The invention concerns flame retardant fabrics made from mixtures of polypyridobisimidazole fibers with cellulose fibers that have been treated to make them flame retardant and articles made therefrom.

Fabrics made from a blend of polypyridobisimidazole/flame-retardant treated cellulose fibers and articles made therefrom

This invention concerns a flame-resistant garment having an outer shell fabric comprising 5 to 50 parts by weight of a polypyridobisimidazole fiber having an inherent viscosity of greater than 20 dl/g and 50 to 95 parts by weight of polybenzimidazole fiber.

Garments comprising a flexible high thermal performance outer shell fabric of polybenzimidazole and polypyridobisimidazole fibers

A ply-twisted yarn useful in cut resistant fabrics is made by providing a first multifilament yarn of continuous organic filaments having a tensile strength of at least 4 grams per denier and having a twist in a first direction of from 0.5 to 10 turns per inch; providing a second yarn comprising 1 to 5 continuous inorganic filament(s); and ply-twisting the first yarn and the second yarn about each other 2 to 15 turns per inch in a second direction opposite to that of the twist in the first yarn to form a ply-twisted yarn having an overall effective twist of +/&#x2212;5 turns per inch.

Ply-twisted yarn for cut resistant fabrics

A woven fabric useful in protective apparel made from yarn components comprising a body fabric yarn component, a synthetic ripstop yarn component having at least 20% greater tensile strength than the body fabric yarn component, and a cut resistant yarn component comprising a yarn having a synthetic staple-fiber sheath and inorganic core, the body fabric yarn component, the ripstop yarn component, and cut-resistant yarn components all being comprised of at least one yarn and each yarn component distinguished from the adjacent yarn component by interweaving orthogonal yarn components.

Fire-retardant fabric with improved tear, cut, and abrasion resistance

A disposable absorbent garment includes a moisture impervious outer layer, a nonwoven moisture pervious inner layer, an absorbent layer sandwiched and encased between the inner and outer layers, with the sandwiched layers having opposed first and second waist edges and two opposed side margins. The garment further includes a fastener or closure system comprising a pair of gripping strips or extensions from each of the side margins along the second waist edge, each gripping strip having a plurality of first resiliently deformable connectors integrally formed therein. The fastener system further includes a pair of targets located on the outer layer along the first waist edge adjacent each side margin, each target having a plurality of second connectors integrally formed thereon which are adapted to engage the first connectors of the gripping strips. The first and second connectors comprise interlocking means of the fastener system and include a plurality of interlockable projections and receptacles. The projections and receptacles may be circular or of any polygonal shape or they may comprise interlocking ridges and grooves. In one embodiment, each of the first connectors is a receptacle comprising a throat which extends through the gripping strip, and each of the second connectors comprise a projection which projects through and interlocks with a gripping strip throat.

Disposable diaper with refastenable mechanical fastening system

A circumferential bead for preventing pin rollover is disposed on a retainer insert mounted in the shell of a stud gripper socket and spaced from the inner surface of the shell. The shell has at least one cam surface on its inner surface and there are roller pins disposed for rolling motion on each cam surface between the cam surface and the retainer insert. Each roller pin includes a circumferential retainer groove; the circumferential bead on the retainer insert engages the grooves on the pins; the bead has a curved contour associated with each cam surface for defining a gap which, intermediate the ends of the cam surface, is at least as wide as the pin diameter less the groove depth to permit the pin to freely roll along the associated cam surface, and which is less than the pin diameter to prevent the pin from falling out of of the shell, and which gap at the ends of the cam surface is narrower than the diameter of the pin less the depth of the groove to pinch the groove and prevent the pin from rolling beyond the ends of its associated cam surface.

Stud gripper socket

Stepped roller pins roll within stepped lobes formed around the interior wall of a hollow cylindrical casing. A hollow cylindrical retainer or simple ring retainer hook into a recessed groove around the middle of the roller and interact with ridges or grooves in the casing to retain the rollers within the lobes. The retainer fits within the limits of movement of a larger diameter section of the roller so that maximum contact is made between the rollers and a smooth stud shaft which is encircled by the casing to any desired extent. The rollers move along the lobes until they lock tight to grip the stud shaft for threading or unthreading. The casing is provided with wrench gripping faces around the exterior. A wrench grips the casing from the side to operate it leaving both ends of the casing open to admit the stud shaft.

Growing community of inventors

Richmond, VA, United States of America

Richard Hall Young